Quote:
Originally Posted by CraigHickman
You're using a fairly low precision gearbox with low precision motors... You're going to have a lot of chatter, no matter how you make it run. If you re-machine your bearing plates to correct tolerance (AM does a good job for the number they make, don't get me wrong), you'll eliminate a lot of this...
However, most spur gear drive trains will make more noise when going slow then when going fast, due to the chatter of the gears. If you absolutely SOAK your gears in lithium grease, you'll lose a lot of the noise... but otherwise you're stuck with it.
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Being low cost should be of no factor--those plates were machined on a CNC mill, so they're precise to within the repeatability of the machine tool (around 0.0002" or so, if it's reasonably new).
The sound he's describing could be a number of things--poorly tensioned chain, sprockets that have slop on the shaft and are allowed to slide back and forth, no grease inside the transmission, etc.